package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * 说明:
 *
 * @author: luohaowei
 * @date:2023/3/7
 **/
public class Copydemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis=new FileInputStream("wx.jpg");
        FileOutputStream fos=new FileOutputStream("wx_2.jpg");
        long start=System.currentTimeMillis();
        byte[] data=new byte[1024*10];
        int len;
        while ((len=fis.read(data))!=-1){
            fos.write(data,0,len );
        }
        long end =System.currentTimeMillis();
        System.out.println("复制完成"+(end-start)+"ms");
        fis.close();
        fos.close();
        /*
        FileInputStream fis=new FileInputStream("wx.jpg");
        FileOutputStream fos=new FileOutputStream("wx_2.jpg");
        long start=System.currentTimeMillis();
        byte[] data=new byte[1024*10];
        int len;
        while((len=fis.read(data)!=-1{
            fos.write(data,0,len);
        }
        long end=System.currentTimeMillis();
        System.out.println("复制完成"+(end-start)+"ms");
        fis.close();
        fos.close();
         */
    }
}
